. >>> tonight, legendary former south african leader nelson mandela has been released from a hospital, and is resting comfortably at home. the 93-year-old mandela underwent some minor surgery after complaining of abdominal pain. though there was understandable concern due to his age, he's 93, south african president jacob zuma says doctor assured him there is nothing to worry about and that mandela is in good health. >>> to presidential politics now. just 48 hours from that crucial primary in michigan where mitt romney was born and raised, tonight polls show romney and rick santorum neck and neck. and both candidates came out swinging today with a momentum of a race hanging in the balance. nbc's ron mott has our report. >> reporter: with the race for michigan zooming toward the finish line on tuesday, today, presidential politics moved to the fast track. mitt romney and rick santorum both showed up at the daytona 500. >> i'll vote for you. >> thank you. i need that. >> upstate new york. >> all right, we need your help. >> reporter: romney in person, in nascar red. santorum's red and b